Fig. 4

Correlation analysis between cerebral perfusion parameters and clinical variables in bilateral amygdala of CM. The CBF and aCBV values of left amygdala (A, B) and right amygdala (C, D) were positively correlated with MIDAS score. CM chronic migraine, CBF cerebral blood flow, aCBV Arterial cerebral blood volume, MIDAs Migraine Disability Assessment Scale